Research The Key Technology Of Dynamic Spectrum Access Based On Database

In recent years, a variety of wireless communication technologies have been developing rapidly. The demand for wireless frequency resources is also growing from all over the world. The rationality of the distribution for the wireless frequency resources is increasingly prominent. Therefore, how to effectively use the limited frequency resources has become a very urgent research problem. Cognitive radio and dynamic spectrum access technology can improve the utilization of frequency resources by the way that unauthorized users access and reuse the White Spaces and unused frequency resources. It can make unauthorized users reliably use the spectrum of authorized users. At the same time, the introduction of database technology also makes the spectrum access more fast and the reuse of spectrum more accurate and reliable. Spectrum access database, according to the location the users upload, can select the TV transmitter information in the database, and then calculate and show the list of available channel. Therefore, spectrum access database plays a very important role for dynamic spectrum access management.The research of this paper is on the basis of cognitive radio technology. We discussed the way that unauthorized users access to TV white Spaces and the combination of database and dynamic spectrum access technology. We constructed the spectrum access database for dynamic spectrum access to the TV spectrum, and designed dynamic spectrum access management software based on the database. The dynamic spectrum access management software can be a complement for the traditional spectrum management, and can make the spectrum management and distribution become more efficient and reliable. On the other hand, it stretched the concept of increasing the efficiency of using spectrum for cognitive radio and dynamic spectrum access technology.